The ports will not help you. If your router blocks all Continuum traffic, most likely there is no way you can play. Still, you can try to see if the router has something called "NAT". See if "UDP" is disabled there. Probably the router does not have that, but who knows. In any case, the local port is random. You need a fully NAT-capable router to play. Cheap routers might not work. You can get the server port by holding down the right mouse button over a zone. Know that it also uses the next port (+1). However, most likely this will not work. NAT is the fix, not ports.